Doesn't look very unique...you are right. Input cap is smaller ...cheaper? and r9 and r10 are 3.3k instead of 2.2k emmiter resistors are .33 instead of .47ohms. Devices are slightly different, though I think that if another pair of output devices were added....you could just overbias the regular p3a to the same effect. Who knows. I'm really just talking out my rear end right now. Anyone else have an opinion?

Well...i got some big heatsinks....maybe I'll crank up the bias to like 3-5A haha. Too bad I don't even have a p3a done yet. Just gotta use a 1kva toroid per channel. No problem Actually, there is a problem...I keep throwing the breaker in my condo when I switch on my Holton monoblocks. later!

It is out - of - date circuit, without any current limitation, with big distortion. New PMA's amp, called A - 2, is similar easy to build and have very much lower distortion - below 0,001 %. It have 30 W into 8 ohm. I have heard it and I must say that's amazing !